212321003 has 2 divisors, whose sum is σ = 212321004. Its totient is φ = 212321002.

The previous prime is 212320987. The next prime is 212321051. The reversal of 212321003 is 300123212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212321003 - 2⁴ = 212320987 is a prime.

It is not a weakly prime, because it can be changed into another prime (212321203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106160501 + 106160502.

It is an arithmetic number, because the mean of its divisors is an integer number (106160502).

Almost surely, 2^212321003 is an apocalyptic number.

212321003 is a deficient number, since it is larger than the sum of its proper divisors (1).

212321003 is an equidigital number, since it uses as much as digits as its factorization.

212321003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 212321003 is about 14571.2388972249. The cubic root of 212321003 is about 596.5739960249.

Adding to 212321003 its reverse (300123212), we get a palindrome (512444215).

The spelling of 212321003 in words is "two hundred twelve million, three hundred twenty-one thousand, three".